CN101214539A - Method for preparing TiC granule partial reinforced abrasion-proof manganese steel composite material - Google Patents
Method for preparing TiC granule partial reinforced abrasion-proof manganese steel composite material Download PDFInfo
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- CN101214539A CN101214539A CNA2008100502159A CN200810050215A CN101214539A CN 101214539 A CN101214539 A CN 101214539A CN A2008100502159 A CNA2008100502159 A CN A2008100502159A CN 200810050215 A CN200810050215 A CN 200810050215A CN 101214539 A CN101214539 A CN 101214539A
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Abstract
A method for preparing a partial reinforcing manganese steel compound material of TiC particles is characterized in that the invention combines a method for compounding the TiC ceramics in a metal liquid through self-expansion reaction in-situ of a Cu-Ti-C system and a casting method; and carries through TiC particle partial reinforcement on the part easily to lose effect, thus better solving the material design difficulty of requiring various performance optimized combinations in a part. The technique process includes two steps of preparing a reaction precast block and the compounding of self-expansion reaction in-situ in a mold. A Cu-Ti-C precast block which has been vacuumized to remove gas is arranged at a part that a case needs reinforcing and is poured by the manganese steel liquid and the self-expansion reaction of the precast block is ignited by the high temperature of the poured steel liquid to prepare the partial reinforcing manganese steel compound material of TiC particles. The partial reinforcing manganese steel compound material of TiC particles prepared by the invention has the comprehensive performances of excellent wearing resistance and obdurability and can be broadly used for various wearing resistance parts under a working condition that impact abrasive particles are worn.
Description
Technical field
The present invention relates to the preparation method of metal-base composites, particularly a kind of TiC granule partial strengthens the preparation method of manganese steel composite material.
Background technology
At present, austenitic manganese steel is an abrasive wear high-abrasive material commonly used under the opposing thump load, and the history in existing more than 100 year so far of coming out is most widely used important high-abrasive material always.Be characterized in having high toughness and low hardness, but the top layer can produce work hardening when standing than thump, just show good wearability this moment, thereby be the anti-friction material that uses under intense impact abrasive wear working condition; Other most of operating modes are seemed that then toughness has a surplus and the hardness deficiency, and running-in wear is serious, especially in, the low impact under the abrasive particle wear working condition because of can not fully work hardening wearability not high.Therefore, under the prerequisite that does not reduce its toughness, improve its wearability and hardness, or improve its in, work hardening capacity under the low impact wear operating mode is the urgent problem that solves.Improve manganese steel wearability and hardness at present both at home and abroad and adopt alloying and dispersion-strengtherning heat-treating methods more, and obtained certain achievement, but the raising of hardness and wearability is limited, is difficult to satisfy instructions for use.Metal-base composites is owing to combine high ductibility, the high tenacity of the high strength, high rigidity, high-wearing feature and the metallic matrix that strengthen body, the excellent comprehensive performances of not available strong, the tough combination of traditional homogenous material can be provided, solve the contradiction of hardness and toughness preferably, thereby, the research focus that the instructions for use of adopting metal-base composites to satisfy various working conditions has become common people to be paid close attention to.
Yet, for particles reiforced metal-base composition in the past patent of invention and research, most adopt overall enhanced (as Chinese patent, the patent No.: ZL98101890.4).But under a lot of practical matter, and do not require that integral material (whole part) all carries out particle and strengthens.The wearing and tearing that mainly occur in faceted pebble, hammer head of hammer crusher as the wearing and tearing of impact breaker bar mainly occur in the end of tup, the wearing and tearing of excavator shovel tooth occur over just crown etc., and the part of other load that withstands shocks then needs to have extraordinary obdurability.In the patent No. is in the Chinese invention patent of ZL02109101.3, a kind of preparation method of steel-base composite feinforced by particles generated in-situ locally is disclosed, this method adopts the synthetic TiC ceramic particle of Al-Ti-C system burning, because the boiling point of Al is lower, gasification easily, therefore, adopt the TiC granule partial enhancing base steel composite material of this system preparation very easily to produce pore, thereby cause its combination property to descend.Therefore, the technology that adopts the synthetic preparation TiC granule partial that combines with the conventional cast method of Cu-Ti-C system burning to strengthen the manganese steel based composites is suggested, this technology has solved grain volume fraction and has surpassed the 10% molten metal property that flows and significantly descend, a difficult problem that is difficult to the complex-shaped foundry goods of moulding by casting has reduced production cost again.This in addition technology has solved a crucial difficult problem that requires multiple performance optimum organization in a part simultaneously preferably, be the ceramic particle of large volume fraction promptly, but not the metallic matrix of above-mentioned failure site have the design philosophy of high obdurability at positions such as easy to wear, easy hot mastication, fatiguability inefficacies.
Technology contents
The objective of the invention is to overcome existing granule partial and strengthen the deficiency that base steel composite material preparation technology exists, a kind of preparation method with the Cu-Ti-C system TiC granule partial reinforced abrasion-proof manganese steel composite material that original position self-propagating combustion synthetic method combines with casting in molten metal is provided.
Realize that the technical scheme that above-mentioned purpose of the present invention is taked is:
A kind of preparation method of TiC granule partial reinforced abrasion-proof manganese steel composite material, its technical process comprise that the preparation of reaction prefabricated block and the interior reaction in-situ that spreads certainly of type synthesize two stages:
The preparation of reaction prefabricated block:
A. prepare burden: Cu-Ti-C system prefabricated section is that pulverous Cu powder, Ti powder and C powder are formed by raw material, and wherein, the Cu mass percent is 10～60, and the mol ratio of C and Ti is C: Ti=1, and powder size is 6～50 microns;
B. batch mixing: the above-mentioned powder for preparing is put into the low speed batch mixer, mixed 8 hours, mix;
C. compression moulding: the powder that mixes is put into mould, at room temperature be pressed into prefabricated section, the prefabricated section compact rate of molding is 75 ± 5%;
D. the vacuum degassing of prefabricated section is handled: the prefabricated section that suppresses is put into the low vacuum heater, be heated to 300 ℃ with 15 ℃/minute the rates of heat addition, degasification 3 hours;
Strengthen particle from spreading the synthetic TiC of reaction in-situ in the type:
A. the matrix molten steel requires: for the synthetic TiC of prefabricated section generation self propagating high temperature reaction that can ignite strengthens particle, molten steel temperature guarantees more than 1450 ℃;
B. the placement of prefabricated section in casting mold: place the Cu-Ti-C prefabricated section that vacuum degassing is handled at the position that foundry goods need strengthen;
C. the casting matrix molten steel prepares the TiC granule partial reinforced abrasion-proof manganese steel composite material.
This scheme is that Cu-Ti-C system original position self-propagating combustion synthetic method in molten metal is combined with casting, easy failure site (as the end of hammer head of hammer crusher and the tip of excavator shovel tooth) when soon the self-propagating reaction prefabricated section is placed on the foundry goods use, dependence pours into the high temperature of molten metal, light the self-propagating reaction prefabricated section in the type of being placed on, carry out the synthetic wild phase of self-propagating combustion, prepare the manganese steel composite material that TiC granule partial zone (failure site when regional area-part uses) strengthens, the matrix that makes the mechanical part of its making both have high tenacity, has high rigidity again, high strength, anti abrasive working position increases substantially the combination property of manganese steel.In addition, the local formation that strengthens the wild phase TiC in the zone is the self-propagating reaction of lighting the Cu-Ti-C prefabricated section by the high temperature of molten metal, wherein the adding of Cu has not only reduced the reaction temperature of the synthetic TiC of reaction, and number of research projects has confirmed in the matrix manganese steel because the adding of a small amount of Cu can suppress carbide separating out on crystal boundary.
The present invention compares with present existing technology has following outstanding advantage:
1, work simplification, cost reduces, and is easy to carry out large-scale production and application.This technology combines original position self-propagating combustion synthetic method in the molten metal with casting, easy failure site when soon the self-propagating reaction prefabricated section is placed on the foundry goods use, dependence pours into the high temperature of molten metal, light the synthetic TiC wild phase of self-propagating reaction prefabricated section reaction in the type of being placed on, prepare the manganese steel composite material that TiC granule partial zone strengthens, technology is simple.Simultaneously, the waste problem of particle had reduced cost when this technology had solved the particle overall enhanced;
2, the local TiC grain volume fraction height that strengthens the position, and adjustable in can realizing on a large scale.TiC particle wild phase of the present invention causes the prefabricated section self-propagating reaction and forms in molten steel is poured into casting mold, do not influence the flowability of molten steel, solved grain volume fraction and surpassed at 10% o'clock, the mobile property of molten metal significantly descends, and is difficult to the difficult problem of the complex-shaped foundry goods of moulding by casting.Can directly cast out the foundry goods of manganese steel composite material large-sized, complex-shaped, that local high grain volume fraction strengthens;
3, strengthen the zone in the part and adopt the synthetic TiC wild phase of Cu-Ti-C system prefabricated section self-propagating reaction, wherein the adding of Cu has not only reduced the reaction temperature of synthetic TiC, and the existence of Cu can suppress carbide separating out on crystal boundary in matrix manganese steel.
Description of drawings
The schematic diagram that Fig. 1 prefabricated section is placed in casting mold;
The TiC granule partial of Fig. 2 20wt.%Cu-Ti-C system preparation strengthens the microstructure of manganese steel composite material enhancement region;
The TiC granule partial of Fig. 3 20wt.%Cu-Ti-C system preparation strengthens the X-ray diffraction analysis of manganese steel composite material enhancement region;
The TiC granule partial of Fig. 4 40wt.%Cu-Ti-C system preparation strengthens the microstructure of manganese steel composite material enhancement region;
The TiC granule partial of Fig. 5 40wt.%Cu-Ti-C system preparation strengthens the X-ray diffraction analysis of manganese steel composite material enhancement region.
Among the figure: A-enhancement region (for example crown part of excavator shovel tooth) B-prefabricated section C-manganese steel matrix (for example tooth storehouse part of excavator shovel tooth) D-casting mold E-ingate F-pours into the cast gate of molten steel to casting mold
The specific embodiment
Embodiment 1
The TiC granule partial of 10wt.%Cu-Ti-C system preparation strengthens the manganese steel based composites with Cu powder (granularity is less than 6 microns), Ti powder (granularity is less than 15 microns) and C powder (granularity is less than 50 microns) are pressed C and Ti mol ratio C: Ti=1, Cu content is that the ratio of 10wt.% is carried out proportioning, the above-mentioned powder for preparing is put into the low speed batch mixer, mixed 8 hours, at room temperature be pressed into the cylindrical reaction prefabricated block of Ф 22 * 10mm, the prefabricated section compact rate of molding is 75 ± 5%; The prefabricated section that suppresses is put into the low vacuum heater, be heated to 300 ℃, carried out vacuum degassing 3 hours with 15 ℃/minute the rates of heat addition; Reaction prefabricated block is taken out, be placed on the position that the casting mold medium casting need strengthen.Matrix is that (the chemical composition mass percent is manganese steel: C, 0.5～1.5, Mn, 5.0～25.0, Si＜1.0, P＜0.1, S＜0.1), the manganese steel molten steel is poured in the casting mold, rely on the high temperature of molten steel, light the Cu-Ti-C system prefabricated section in the type of being placed on, self-propagating reaction takes place, strengthen manganese steel composite material thereby prepare the TiC granule partial.The hardness and the wearability of the TiC granule partial reinforced abrasion-proof manganese steel composite material of preparing have obtained large increase, consult table 1.
The hardness and wear resistance of table 1 composite enhancement region and matrix
| Material | Matrix | Local enhancement region (Cu content, wt.%) | ||||
| 10 | 20 | 30 | 40 | 50 | ||
| Hardness (HRC) volume wear (10 -10m 3/m) | ＜20 2.3 | 47.2 1.9 | 35.7 1.5 | 30.8 1.2 | 28.7 1.1 | 26.5 1.7 |
Embodiment 2
The TiC granule partial of 20wt.%Cu-Ti-C system preparation strengthens the manganese steel based composites
With Cu powder (granularity is less than 6 microns), Ti powder (granularity is less than 15 microns) and C powder (granularity is less than 38 microns) are pressed C and Ti mol ratio C: Ti=1, Cu content is that the ratio of 20wt.% is carried out proportioning, the above-mentioned powder for preparing is put into the low speed batch mixer, mixed 8 hours, at room temperature be pressed into the cylindrical reaction prefabricated block of Ф 22 * 10mm, the prefabricated section compact rate of molding is 75 ± 5%; The prefabricated section that suppresses is put into the low vacuum heater, be heated to 300 ℃, carried out vacuum degassing 3 hours with 15 ℃/minute the rates of heat addition; The reaction prefabricated block taking-up is placed on the position that the casting mold medium casting need strengthen.Matrix is that (the chemical composition mass percent is manganese steel: C, 0.6～1.4, Mn, 6.0～20.0, Si＜1.0, P＜0.1, S＜0.1), the manganese steel molten steel is poured in the casting mold, rely on the high temperature of molten steel, light the Cu-Ti-C system prefabricated section in the type of being placed on, self-propagating reaction takes place, strengthen manganese steel composite material thereby prepare the TiC granule partial, the microstructure of its enhancement region and XRD analysis are consulted Fig. 2 and shown in Figure 3.
The TiC granule partial of 40wt.%Cu-Ti-C system preparation strengthens the manganese steel based composites
With Cu powder (granularity is less than 6 microns), Ti powder (granularity is less than 15 microns) and C powder (granularity is less than 38 microns) are pressed C and Ti mol ratio C: Ti=1, Cu content is that the ratio of 40wt.% is carried out proportioning, the above-mentioned powder for preparing is put into the low speed batch mixer, mixed 8 hours, at room temperature be pressed into the cylindrical reaction prefabricated block of Ф 22 * 10mm, the prefabricated section compact rate of molding is 75 ± 5%; The prefabricated section that suppresses is put into the low vacuum heater, be heated to 300 ℃, carried out vacuum degassing 3 hours with 15 ℃/minute the rates of heat addition; The reaction prefabricated block taking-up is placed on the position that the casting mold medium casting need strengthen.Matrix is that (the chemical composition mass percent is manganese steel: C, 0.7～1.3, Mn, 7.0～13.0, Si＜1.0, P＜0.1, S＜0.1), the manganese steel molten steel is poured in the casting mold, rely on the high temperature of molten steel, light the Cu-Ti-C system prefabricated section in the type of being placed on, self-propagating reaction takes place, strengthen manganese steel composite material thereby prepare the TiC granule partial, the microstructure of its enhancement region and XRD analysis are consulted Fig. 4 and shown in Figure 5.
Embodiment 4
The TiC granule partial of 60wt.%Cu-Ti-C system preparation strengthens the manganese steel based composites
With Cu powder (granularity is less than 6 microns), Ti powder (granularity is less than 15 microns) and C powder (granularity is less than 50 microns) are pressed C and Ti mol ratio C: Ti=1, Cu content is that the ratio of 60wt.% is carried out proportioning, the above-mentioned powder for preparing is put into the low speed batch mixer, mixed 8 hours, at room temperature be pressed into the cylindrical reaction prefabricated block of Ф 22 * 10mm, the prefabricated section compact rate of molding is 75 ± 5%; The prefabricated section that suppresses is put into the low vacuum heater, be heated to 300 ℃, carried out vacuum degassing 3 hours with 15 ℃/minute the rates of heat addition; The reaction prefabricated block taking-up is placed on the position that the casting mold medium casting need strengthen.Matrix is that (the chemical composition mass percent is manganese steel: C, 0.7～1.2, Mn, 9.0～13.0, Si＜1.0, P＜0.1, S＜0.1), the manganese steel molten steel is poured in the casting mold, rely on the high temperature of molten steel, light the Cu-Ti-C system prefabricated section in the type of being placed on, self-propagating reaction takes place, strengthen manganese steel composite material thereby prepare the TiC granule partial.
Claims (1)
1. the preparation method of a TiC granule partial reinforced abrasion-proof manganese steel composite material is characterized in that technical process comprises in the preparation of reaction prefabricated block and the type from spreading synthetic two stages of reaction in-situ:
The preparation of reaction prefabricated block:
A. prepare burden: Cu-Ti-C system prefabricated section is that pulverous Cu powder, Ti powder and C powder are formed by raw material, and wherein, the Cu mass percent is 10～60, and the mol ratio of C and Ti is C: Ti=1, and powder size is 6～50 microns;
B. batch mixing: the above-mentioned powder for preparing is put into the low speed batch mixer, mixed 8 hours, mix;
C. compression moulding: the powder that mixes is put into mould, at room temperature be pressed into prefabricated section, the prefabricated section compact rate of molding is 75 ± 5%;
D. the vacuum degassing of prefabricated section is handled: the prefabricated section that suppresses is put into the low vacuum heater, be heated to 300 ℃ with 15 ℃/minute the rates of heat addition, degasification 3 hours;
Strengthen particle from spreading the synthetic TiC of reaction in-situ in the type:
A. the matrix molten steel requires: for the synthetic TiC of prefabricated section generation self propagating high temperature reaction that can ignite strengthens particle, molten steel temperature guarantees more than 1450 ℃;
B. the placement of prefabricated section in casting mold: place the Cu-Ti-C prefabricated section that vacuum degassing is handled at the position that foundry goods need strengthen;
C. the casting matrix molten steel prepares the TiC granule partial reinforced abrasion-proof manganese steel composite material.
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| CN102176973A (en) * | 2008-09-19 | 2011-09-07 | 马格托国际股份有限公司 | Composite impactor for percussion crushers |
| CN102179501A (en) * | 2011-04-26 | 2011-09-14 | 江苏大学 | Method for preparing TiC/Al3Ti intermetallic compound base surface composite coating |
| CN102242303A (en) * | 2011-07-26 | 2011-11-16 | 吉林大学 | In-situ nano TiC ceramic particle reinforced copper based composite material and preparation method thereof |
| CN102274951A (en) * | 2011-08-04 | 2011-12-14 | 广东新劲刚超硬材料有限公司 | Method for synthesizing titanium carbide-base hard alloy coating on surfaces of castings in situ |
| CN102921923A (en) * | 2012-10-25 | 2013-02-13 | 江苏大学 | Method for preparing TiC+Al2O3 particle-reinforced steel-based surface-recombined excavator form-relieved tooth |
| CN103302235A (en) * | 2013-06-18 | 2013-09-18 | 北京科技大学 | Method for reacting and cladding alumina-based coating on surface of casting |
| CN103831421A (en) * | 2014-03-26 | 2014-06-04 | 铜仁学院 | Method for preparing local enhancement aluminum matrix composite |
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| CN102176973A (en) * | 2008-09-19 | 2011-09-07 | 马格托国际股份有限公司 | Composite impactor for percussion crushers |
| CN102179501A (en) * | 2011-04-26 | 2011-09-14 | 江苏大学 | Method for preparing TiC/Al3Ti intermetallic compound base surface composite coating |
| CN102242303A (en) * | 2011-07-26 | 2011-11-16 | 吉林大学 | In-situ nano TiC ceramic particle reinforced copper based composite material and preparation method thereof |
| CN102274951A (en) * | 2011-08-04 | 2011-12-14 | 广东新劲刚超硬材料有限公司 | Method for synthesizing titanium carbide-base hard alloy coating on surfaces of castings in situ |
| CN102274951B (en) * | 2011-08-04 | 2013-03-06 | 广东新劲刚超硬材料有限公司 | Method for synthesizing titanium carbide-base hard alloy coating on surfaces of castings in situ |
| CN102921923A (en) * | 2012-10-25 | 2013-02-13 | 江苏大学 | Method for preparing TiC+Al2O3 particle-reinforced steel-based surface-recombined excavator form-relieved tooth |
| CN103302235B (en) * | 2013-06-18 | 2015-09-09 | 北京科技大学 | A kind of method of cast(ing) surface reactive cladding alumina base coating |
| CN103302235A (en) * | 2013-06-18 | 2013-09-18 | 北京科技大学 | Method for reacting and cladding alumina-based coating on surface of casting |
| CN103831421A (en) * | 2014-03-26 | 2014-06-04 | 铜仁学院 | Method for preparing local enhancement aluminum matrix composite |
| US20160230110A1 (en) * | 2015-02-06 | 2016-08-11 | Naco Technologies, Sia | Nanocomposite solid lubricant coating |
| US9650585B2 (en) * | 2015-02-06 | 2017-05-16 | Naco Technologies, Sia | Nanocomposite solid lubricant coating |
| CN108348995A (en) * | 2015-11-12 | 2018-07-31 | 伊诺科有限责任公司 | Method for manufacturing the powder composition of casting inserts, casting inserts and obtain local recombination region in casting |
| CN108348995B (en) * | 2015-11-12 | 2021-11-16 | 伊诺科有限责任公司 | Powder composition for manufacturing a casting insert, casting insert and method for obtaining a local composite zone in a casting |
| EP3270093A1 (en) * | 2016-07-15 | 2018-01-17 | Craco GmbH | Compound armour and method for the preparation of same |
| RU2720008C1 (en) * | 2019-09-23 | 2020-04-23 | Публичное акционерное общество "Русполимет" | Method of vacuum thermal degassing of heat-resistant granules, titanium alloy or steels in movable layer and device |
| CN111730042A (en) * | 2020-07-01 | 2020-10-02 | 吕新起 | Preparation method of ceramic particle reinforced steel-based composite material based on SHS technology |
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